<div class="rte-inputbox" ref="root">
  <span class="rte-inputbox__caret" contenteditable="true" ref="caret"></span>
  <ul class="rte-inputbox__select" ref="select" :show="showlist">
    <li class="rte-inputbox__select-option">内容</li>
  </ul>
  <style ref="interim"></style>
</div>
